What does everyone think about those AST buffs?

[Nektulos-Tuor]

Synastry buffs healing by 20%, Marks a party member to receive 40% of all your heals and therefore is healed an additional 40% when you single target heal them and has a cool down of 90 seconds.
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Dissipation gives you 3 Aetherflow stacks, sacks your fairy, and increases your healing by 20% to compensate with an anti-fairy resummon timer of 30 seconds and a recast of 180.
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What are both of these skills meant to do? Increase your healing output to stop what could have been a wipe. Which skill seems to have gotten all the love and none of the trade-off?
O.o
They really should look into the 60 SCH skill. It's a neat idea poor execution.

Dissipation lowers your healing actually. It also costs a "TON" of mana.